Entropy - learning decision trees, Computer Engineering

Assignment Help:

Entropy - learning decision trees:

Through putting together a decision of tree is all a matter of choosing that attribute to test at each node in the tree. Further we shall define a measure that is information gain that will be used to decide which attribute to test at each node. By considering through information gain is itself calculated utilising a measure called entropy that we first define for the case of a binary decision problem so then define for the general case. 

As per given a binary categorisation like C, and a set of examples, S, that are utilising the proportion of examples categorised as positive by C is p+  or the proportion of examples categorised  like negative by C is p-, then the entropy of S is as: 

641_Entropy - learning decision trees.png

Now next here instantly we defined entropy first for a binary decision problem is easier to get an impression of what it is trying to calculate. As Tom Mitchell puts this quite well: like 

"In order to define an information gain precisely so we begin by defining a measure commonly utilising in information theory that is called entropy in which characterizes the (im)purity of as an arbitrary collection of examples."


Related Discussions:- Entropy - learning decision trees

How will you prepare problem statement, How will you prepare problem statem...

How will you prepare problem statement? Problem statement should state what is to be completed and not how it is to be executed. It should be a statement of requirements not a

DW, Define a job scheduling strategy that will meet business requirement of...

Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes

Define the advantages of assembly language., Highlight the advantages of as...

Highlight the advantages of assembly language. The benefits of assembly language program would be Reduced errors Faster translation times Changes could be made fas

What is immediate addressing, What is Immediate addressing The  data  i...

What is Immediate addressing The  data  itself,  beside  the address,  is  given  as  the  operand or operands  of  the instruction.

Explain about the functionality of olap, Hyper cube or multidimensional cub...

Hyper cube or multidimensional cube forms the core of OLAP system. This having of measures which are arranged according to dimensions. Hyper cube Meta data is formed by star or sno

Explain the effect of cell breathing, Problem : (a) State and describe ...

Problem : (a) State and describe the transmission ranges associated with wireless transmission. Illustrate your answer with a diagram. (b) Sketch a graph representing how a

Explain readers-writers problem, Explain Readers-writers problem. Read...

Explain Readers-writers problem. Readers-writers problem: Assume that a data object (as a file or record) is to be shared between several concurrent processes. The readers ar

Why a computer expect to receive responses, Why a computer expect to receiv...

Why a computer expect to receive responses when it broadcast an ARP request? Response will be acquired only from the machine for that request is being sent not for the other ma

Explain the terms constructors and destructors, When we initialize the form...

When we initialize the form at that time if we require to set any variable's value then we can set it by defining in constructor. Constructor's name always similar as class name an

What is verilog, What is Verilog Verilog  language  is  still  rooted  ...

What is Verilog Verilog  language  is  still  rooted  in  it's  native  interpretative  mode.  Compilation  is  a means of speeding up simulation however has not changed the or

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd